AspNetCore AmbiguousMatchException: The request matched multiple endpoints. Matches

檢查：

1.StartUp.cs

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");

                //添加了區域后，此規則不會自動創建！！！
                endpoints.MapAreaControllerRoute(
                       name: "areas", "areas",
                       pattern: "{area:exists}/{controller=Home}/{action=Index}/{id?}");
            });    

2.檢查區域控制器

 [Area("PI")] [Route("PI/[controller]/[action]")]
    public class HomeController : Controller
    {

    }

　　

ok！